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Is the amount of space charge created at the cathode is primarily controlled by the tube current?
Wiki User
∙ 14y ago
The cathode space charge is determined by the voltage on the filament.
Wiki User
∙ 14y ago
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Why Silicon Controlled Rectifier is called current controlled device?
Because it is controlled by the gate current
What is the direction of current flow in a diode valve?
Inside the diode valve the conventional curret flow is from anode to cathode. The electron flow is from cathode to anode.
Why ujt called current controlled negative resistance device?
The On/OFF action in UJT is controlled by emitter current
What is current controlled current sources?
A unidirectional current controller device is a type of electrical on/off switch. In order for an item to work that is plugged into a particular outlet, the switch must be in the on position. It is like having lamps plugged into outlets that are controlled by only one switch.
When a 10mA forward bias current and the voltages at the anode and cathode of a diode in a circuit are found to be the same what is the diode most likely to be?
With a 10mA forward bias current, if the voltages at the anode and cathode of a diode in a circuit are found to be the same, then the diode most likely to be shorted.
Why gate is closer to cathode in scr?
A: To partially eliminate the problems with cathode current hugging
What two things must happen to cause an silicon controlled rectifier to fire?
You must have a voltage on the gate that exceeds the turn-on threshold of the SCR. Typically around 0.65v. Then you must maintain a minimum holding current from Anode to Cathode. Once turned on, the SCR will remain self latched in the on state until the current through the Anode and Cathode falls below the minimum self holding current.
When electric current is passed through water which gas is produced on cathode?
When an electric current is passed through water oxygen gas is produced on cathode because oxygen is positive and cathode is negative . So, oxygen is produced.
What prompted early scientists to propose that the ray of the cathode ray tube was due to the cathode?
The electron had already been discovered. It took little imagination to "see" that the cathode ray was the beam of electrons that originated from the cathode. And the beam was controlled using techniques based directly on what was correctly understood about the electron. The cathode ray could only be an electron beam generated at the cathode. Conventional elctric current flow is usually thought of as flowing from positive to negative, but at the quantum level; due to electrons having a negative charge; technically they really flow from negative to positive, and this is apparent in the cathode ray tube. Its the negatively charged electrons that glow in a cathode ray tube, and do so from the negative terminal, or cathode, hence the name.
Is scr current controlled device?
yes it is current controlled
What emits light when the current flows from the anode to the cathode?
lioght
Forward current of led?
The forward current of an LED is current that goes from the anode of the LED to the cathode (the forward direction).
Why Silicon Controlled Rectifier is called current controlled device?
Because it is controlled by the gate current
In electro deposition current density of bath means current per unit area of anode or cathode?
In electro deposition current density of bath means current per unit area of cathode.in which proportion rate depends on cathode to anode area?
What is the Difference between voltage controlled device and current controlled device?
The difference between a current control device and voltage controlled device is that for current controlled device, the current is constant and the voltage is variable while for a voltage controlled device, the voltage is constant and the current is variable.
Why flow of current from cathode to anode still the flow of electrons is from cathode to anode?
The direction of current, according to convention, is the direction opposite the direction of electron flow. Remember that the anode is where oxidation occurs, so electrons are lost by the anode. These electrons then move from the anode, to the cathode by a wire that usually connects the two compartments. To reiterate, the electrons flow from the anode (site of oxidation) to the cathode (site of reduction). Because electrons flow from anode to cathode, by convention the direction of current is from cathode to anode (the direction opposite the flow of electrons). Hope this helps!
Why is galvanometer used when you know that electric current travels from cathode to anode of the battery?
I think that you talk about the usage of galvanometer in photoelectric emission experiment. Right? The main purpose of using a galvanometer is to know about whether current flows or not and also the direction in which current flows. Moreover current flows right from anode to cathode and electrons do flow from cathode to anode within the discharge tube.
